[INFO] cloning repository https://github.com/simmons/mpsc-stress
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/simmons/mpsc-stress" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimmons%2Fmpsc-stress", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimmons%2Fmpsc-stress'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 673090edfbfd53fee1ba54a111bf550a71dd04e0
[INFO] checking simmons/mpsc-stress against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimmons%2Fmpsc-stress" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/simmons/mpsc-stress on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/simmons/mpsc-stress
[INFO] finished tweaking git repo https://github.com/simmons/mpsc-stress
[INFO] tweaked toml for git repo https://github.com/simmons/mpsc-stress written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/simmons/mpsc-stress already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1f64cbd2faa64efa8bd8dfb8b0eda2ff61d6294382194a7f19fd0a0e61f3c9b7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1f64cbd2faa64efa8bd8dfb8b0eda2ff61d6294382194a7f19fd0a0e61f3c9b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f64cbd2faa64efa8bd8dfb8b0eda2ff61d6294382194a7f19fd0a0e61f3c9b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f64cbd2faa64efa8bd8dfb8b0eda2ff61d6294382194a7f19fd0a0e61f3c9b7", kill_on_drop: false }`
[INFO] [stdout] 1f64cbd2faa64efa8bd8dfb8b0eda2ff61d6294382194a7f19fd0a0e61f3c9b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bff0b4e7124a7b628269ff080c376af5fcd9da5985162fc08e1531d29589cb3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2bff0b4e7124a7b628269ff080c376af5fcd9da5985162fc08e1531d29589cb3", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v0.1.4
[INFO] [stderr]     Checking futures v0.1.23
[INFO] [stderr]     Checking byteorder v1.2.4
[INFO] [stderr]     Checking lazycell v0.6.0
[INFO] [stderr]     Checking lazy_static v1.0.2
[INFO] [stderr]     Checking slab v0.4.0
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking log v0.4.3
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking crossbeam-epoch v0.4.3
[INFO] [stderr]     Checking bytes v0.4.9
[INFO] [stderr]     Checking mio v0.6.15
[INFO] [stderr]     Checking crossbeam-deque v0.3.1
[INFO] [stderr]     Checking tokio-executor v0.1.2
[INFO] [stderr]     Checking tokio-io v0.1.7
[INFO] [stderr]     Checking tokio-threadpool v0.1.5
[INFO] [stderr]     Checking tokio-timer v0.2.4
[INFO] [stderr]     Checking tokio-reactor v0.1.2
[INFO] [stderr]     Checking tokio-codec v0.1.0
[INFO] [stderr]     Checking tokio-udp v0.1.1
[INFO] [stderr]     Checking tokio-tcp v0.1.0
[INFO] [stderr]     Checking tokio-fs v0.1.2
[INFO] [stderr]     Checking tokio v0.1.7
[INFO] [stderr]     Checking mpsc-stress v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.29s
[INFO] running `Command { std: "docker" "inspect" "2bff0b4e7124a7b628269ff080c376af5fcd9da5985162fc08e1531d29589cb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bff0b4e7124a7b628269ff080c376af5fcd9da5985162fc08e1531d29589cb3", kill_on_drop: false }`
[INFO] [stdout] 2bff0b4e7124a7b628269ff080c376af5fcd9da5985162fc08e1531d29589cb3